Two or more fat people riding together in motorized carts, scooters, electric grocery carts, electric wheelchairs, or any other 'assisted mobility' product.

Most of these can be found fairly easily in grocery stores not only the mammoth amount of space they consume, but the sound of their mobility unit's motor and/or chains screaming in pain as they move, and the constant 'beeping' they make as they inch along in reverse.

I wanted to go down the cereal aisle, but my way was blocked by a fat convoy.